Stop mechanism for talking machines



LE ROY CGPLI N, OF WINDBER, PENNYLVANIA.

STO]? MECHANISM FOR TALKING MACHINES.

Specification of Letters Patent.

Patented Jan. a, raise.

Application filed. March 16, 1921. Serial No. 452,697.

To alt whom itmcg concern.- 1

Be lt known that 1, LE ROY CorLiN, a.

' citizen 01"" the United States residin at provide an automatic non-set stop for talk.-

ing machines controlled exclusively by the motion of the tone arm and which requires no setting or attention by the operator.

Another object is to so construct such I mechanism that the 'brake'will be applied.

gently and smoothly to stop the turntable avoiding abrupt stoppage oi the machine and the injurious eil'ects incident thereto.

Another object is to provide a stop of this character which can be used on any talking machine not employing a gear driven tone.

arm such as the Edison, without in any way altering, the machine; which 18 simple in construction and cheaply manufactured and which operates simply and positively.

Another object is to provide a brake applying device for talking machines so con structed and connected with the tone arm that the brakecan only be applied when the 7 tone arm ceases to move which occurs when the last thread of the record 1s reached.

Another object is to so construct and con nect such a stop that the tone ,arm may be lifted and moved outward beyond the turnv table to provide for the change of a record without releasing the brake, which release is effected by the moving inward of the tone arm into playing position on the record.

With these and otherobjects in view, the

invention consists in certain novel features of constructionas hereinafter shown and described and specifically pointed out in the claims, and inthe drawings illustrative of the'preierred embodiment of the invention.

In the accompanying drawings: Figure" 1 represents a top plan view of a talking machine turntable with the tone arm shown lifted off the record to provide for the changing thereof, a part of said table being broken out to disclose the attachment constituting this invention, the

parts of the attachment being in the position assumed when the record has been completed and brake applied.

2'is an enlarged detail sectional view taken on the line of Fig. 1 and,

L Fig. '3 is a detail plan view of the portron of a bar or plate constituting a part of the friction connecting means between certain of the members.

In the embodiment illustrateda turntable T is shown mounted centrally on a post P and over which is mounted to operate a tone arm A carrying the reproducer R.

These parts are of ordinary construction I such as are usually found in talking ma.- chines employing disc records and form no part of the invention. a

The. attachment constituting this invention is mounted beneath the turntable T preferably on a metal plate 1 to be screwed on the board B underneath the turntable,

and comprises asmall gear 1 mounted on the center post i which mesheswith a larger gear 2 carryingon its upper face a friction washer which is here shown in the form of a three pointed star, onepoint of which carries on its outer end depending pin or stud for a purpose presently to be described, the point or finger 3 which carries thestud 5 being flush with the top of the washer 3 while the other points are offset downwardly and have frictional contact with the gear 2. l i

The top or the Cabinetmthe board s is i mortised out as shown at 7 to receive the gears 1 and 2 which are POSltlOIIGCl therein.

with their faces flush with the upper face,

of the board B, to provide for the use of a flat plate 1 to bear throughout its length against the member B as is shown clearly in Fig. 1. p

A plate 5 is mounted loosely at one end on a screw bearing 6 at a point to the left of gear 2. This plate 5'has a transversely arranged slot 8 intermediate its ends through which a headed stud projects, said stud being carried by the plate 1*. Tl'llS stud and slot operate to limit the swinging movement of plate 5 in opposite directions, whlch movement is accomplished by means presently to be described.

Ellie plate 5 is also provided on its inner edge with an upturned inclined lip for cooperation with the stud l for a purpose presently to he described and which corre sponds to and performs the same function. of the lip 10 shown in the application above referred to; I

A brake 20 is carried by one .end of an L-' shaped orbell crank lever 21 fulcrumed at its otherend to the plate 1 as shown at 22 I and to the elbow of which is nivotally con-- The brake is positioned adjacent the perimeter of the turntable 'l 'and is movable nected one endof a bar 23 as shown at 24.

radially toward and away from the edge of said table on the application or release of the brake. 'The inner end of the bar 23 carries a longitudinally slotted head 25 through the slot 26-of which passes a headed stud 27 carried by tl e free end of theplate 5.

I The terminal of head 25 has an upstanding lug 29 which is adapted to be positioned in the path of the stud i when the plate 5 is at the limit of its innermost movement as shown in Fig. 1, theslot 26in the head 25 permittingthe brake bar to be moved lon- 'gitudinally for applying and releasing the brake, the application of the brake being effected by the engagement ofthe pin 4; with the lug 29 on said-head and WillCll occurs only when the tone arm ceases its movement.

A coiled spring 30 is connected at one-end with the bar 23 and at itsother end withv the plate 1 and operates to normallyinove has a rearwardly. extending spring tongue 14 forming one wall. of the'slot 1 3 througln out a portion of its'leng'th and which cooperateswith fri' tiorl discs 16 and 17 carried by a stud 18'eXtending upwardly from plate 5 th oufih the slot 13. A coiled spring 19 is mounted on the stud 18 between the upper dis l6iand a nut 19 carried by the stud 18 which controls the frictional connection between theplate 5 and the bar 11.

s The pivotal connection between the front 4 end of the arm 15 and the rear end of the barll is sufiicientlv loose to provide for the unsteady motion of-the tone arm while playinn a record without'affecting the stopping mechanism;

In the use of this att c irnent it being applied as shown n Fig,

i a L 1, the inward or cencient distance to move the lug 29101111116 brake bar 23 out of the path of the stud l carried by the friction washer or disc The movement of the tone arm in theopposite direction moves the arm 15 inward causing the bar 11 to slide betweenthe friction washers 16 and 17 and to exert sufiicient.

force on the plate 5 to move it inwardlyso that when the pin a is engagedwith'thelug 29 for locking the brake in operativel'position the outward movement of the tone arm willnot release it. v

Five turns of therecord will move the tone arm i i five threads nearer to the center of the record and during this movement the gear 2 will make one revolution. Ihe'revolution of the gear 2 correspondingly rotates the friction washer 3 and on each revolution thereof the stud l engages the lip lOof plate 5 which lip beingbent atan angle as'shown causes the plate 5: to be pulled inward while the impelling force of the tone arm. operates to move the plate 5 including the lip 10 and the brake bar carried lug 29 out-ward so that said lug 29 will be out of the path of'the stud 4 and prevent application .of the brake while the record is playing or the tone arm is moving inward. It will thus beseen that the tone arm will swing; the plate 5 Boutwardly while the pin 4 engaging the lip 10 will swing it inwardly. The backwardnor outward movement produced by the action of the tone arm on plate 5causes the pin 1' to escape engagement with the lug 29 on the. brake bar 23 thereby avoiding the. application of the brake during the "playing; of a 1ec01d,'it being necessary'to provide this oscillatory movement ofplate 5 so that when the tone arm ceases to move at the end of a record it will have no effect on plate 5,56 that the ing- 29 will be positioned in thepa'th of the stud 4- and will be engaged by said stud on the'turning of the gear2-which will cause the brake bar 23 to be moved longitudinally inward, thereby applying the-brake and stopping the. machine. The friction washer 3 whi h carries the-studl will permitthe brake to be applied gently and smoothly and avoid abrupt stoppage of the machine. V V j i ln the operation of this attachment when the brake is applied by the stoppage of the tone arm in the manner above .describedand' as shown in Fig.1 the reproducer R is lifted and moved outward beyond the perimeterof the turntable and the record mounted there on to permitchanging of the recordand this outward movement as above described does not relea h br ke becau e the inwa d movement of the arm also moves the plate or bar -ll inward and the plate 5 connected under the tension of the coiled spring will move outward away from the perimeter of the turntable and permit said table to rotate carrying with it the record to be played.

From the above description it will be obvious that if the reproducer is removed from the record by the operator either before or after the record is played or during the playing of the record the turntable will stop without any attention from the operator. This is due to the fact that there is no means for swinging outwardly the plate 5 and permitting the brake carried lug 29 to be re tracted except when the tone arm is being moved centerward such as occurs during the playing of a record.

The preferred embodiment ofthe invention is disclosed in the drawings and set forth in the specification, but it will be understood that any modifications within the scope of the claimed invention may be made in the construction without departing from the principle of the invention or sacrificing any of its advantages.

What is claimed is:

1. In an automatic non-set stop for talking machines, the combination with a tone arm; of a brake normally held in inoperative position. means for applying said brake, and a slidable frictioniconnection between said tone arm and one member of said brake applying means operable on the inward movement of the tone arm to prevent application of the brake.

2. In an automatic non-set stop for talking machines, the combination with a tone arm; of an arm fixed at one end to said tone arm, a bar pivoted at one end to the free end of said arm, a brake normally held in inoperative position, means for applying said brake, and a slidable friction connection between said bar and one member of said brake applying means operable on the inward movement of the tone arm to prevent application of the brake.

3. In an automatic non-set stop for talk- 1 ing machines, the combination with a tone arm; of a brake carrying bar normally held in inoperative position, a member mounted for oscillatory movement and having a pin and slot connection with said brake bar, a rotary member, means on said rotary member and said. bar for engaging when the 05-' cillatory member is swung in one direction and 'a sliding friction connection between saidoscillatory member and said tone arm whereby said member is swung to prevent engagement of the rotary member with the brake bar when the tone arm is moved inwardly.

4-. In a stop-of the class described, the combination with a tone arm; of a turntable, a

- post connected to rotate said table, a reciproeating brake carrying bar, a spring to hold said bar with the brake normally in inoperative position, rotary means operable by the turntable operating means to engage saidv bar and move it against the tension of the spring to apply the brake, and slidable friction means controlled by the tone arm to move the bar out of the path of said rotary means while the tone arm is in motion.

5. The combination with a tone arm and a bar to slide longitudinally on the plate, 7 means for limiting the swinging movement of said plate, a rotary element mounted to engage said plate and swing it inone direction to bring the brake bar in the path of said element, a bar having sliding friction connection with said plate, an arm fixed to said tone arm, said arm and bar beingpivotally connected.

6. An attachment of the class described comprising a base plate for mounting on a talking machine below the turntable thereof; an L-shaped lever fulcrumed at one end on said plate and having braking means on its other end, a brake rod pivoted at one end to the elbow of said lever, a coiled spring connected to normally hold the brake inoperative, a plate mounted to swing horizontally on said base plate, means for limiting the swinging movement of said plate, a pin and slot connection between the free end of said plate and said brake rod, an arm to be fixed at one end to the tone arm, a bar pivoted at one end to the'free end of said arm and having a sliding friction connection with said pivoted plate, whereby the plate is swung in one direction by the tone arm,

a turntable; of a reciprocating brake carrying bar, a spring to hold said bar with the brake normally in inoperative position, a plate pivoted to swing horizontally under said turntable, a connection between said plate and arm whereby the bar swings with tional connection between said pin and the the plate means for limiting the swinging Walls of said slot, and means for gradually 10 movement of said plate, a rotary element increasing the friction between these memmounted to engage said plate and swing it in bets on the for'warcl' movement of said bar.

one direction tebring. the brake bar in the In testimony whereof, I aflix my signature path of said element, a bar having a pin hereto.

and slot connection with said horizontally swinging plate, means for producing fric- LEROY CO PL IN, 

